Curated OER
Multiplication Stories
Second graders solve various multiplication math word problems involving cars and people, fish and fish bowls, and tables and table legs. They write and solve multiplication story problems related to whole numbers, addition, subtraction,...
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What Must Be Added?
In this addition worksheet, students, while answering 15 addition questions, answer each question without doing any written work. Students solve each answer with mental math strategies.
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The Nature of Mathematics
Students work in groups to describe plants using numbers. In this number lesson, students use numbers to define plants and then use numbers to write descriptions of themselves.
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Fires and Fire Suppression
Students examine their assumptions about forest fires. They explore the conflicts involved with the forest service's new strategy. in addition, they will study one case where a prescribed natural burn had a significant impact on a later,...
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Math Cross--Puzzle #27
In this hours/minutes and rounding instructional activity, students fill in a crossword puzzle as they solve the answers to twenty-eight math problems or word problems involving hours/minutes and rounding. Students utilize mathematical...
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How the West Was One - Three x Four
While this activity provides a motivating and interesting way to review the concept of the order of operations, it involves the use of software called How the West Was One + Three x Four. There are also other resources that are...
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Adding and Subtracting Up to 5
Basic addition and subtraction need to be mastered before moving on to more challenging mathematics. This resource provides learners with one addition and one subtraction problem. They read the explanation included to learn how to solve...
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Add and Subtract within 20 - Guided Lesson Explanation
Provide second graders with an explanation for how to find the total value of numbers written in a series of boxes.. The resource provides answers and explanations for problems on a referenced activity that is not included.
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Mental Math Counts
Learners use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...
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Pipe Music With Decimals
Students discuss strategies for solving problems with decimals. They find the sum of problems through recognizing place value and by practicing adding numbers both vertically and horizontally. They read and solve real life word...
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Ten Sly Piranhas: A Counting Story in Reverse
Students solve related addition and subtraction problems. In this addition and subtraction lesson, students use the book Ten Sly Piranhas by William Wise as the source of word problems for students to solve.
Alabama Learning Exchange
Pizza! Pizza! Pizza!
Fifth graders practice using money in everyday situations. They use their addition and subtraction skills as they work in cooperative groups to solve problems involving decimals.
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Multiplication: Building Models, Representations and Explanations
First graders explore multiplication concepts through skip counting, repeated addition and arrays. Using animal characteristics as a context, 1st graders solve problems using mathematical tools such as hundreds charts, number lines, ...
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The Number Partner
First graders study number pairs and identify number pairs that sum to numbers from 10 to 30. They use number pairs to solve addition and subtraction problems. They make sensible estimates and check the reasonableness of answers.
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The Multiplier (small 2-digit by 1-digit numbers)
Second graders study digits in 2- or 3-digit whole numbers. They write and solve story problems which involve whole numbers, using addition, subtraction, multiplication, or division.
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How Do The Colors of Light Mix?
Students investigate the mixing of light. They form a hypotheses to reason why color changes occur and they write conclusions and ask new questions arising from the investigation. Students identify the primary and complementary colors of...
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Commutative Property
First graders investigate the Commutative Property of Addition. It is introduced using models such as students, counters, balances and dominoes. They discover the order of the numbers in an addition sentence does not change the result...
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Money for starters
Students compare the values of coins and paper money. They read prices, read and write any 2-digit number. They model and explain addition calculations with a sum of up to 20.
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Frogs in Ponds
First graders determine how numbers are made up of other smaller numbers before examining addition and subtraction. They determine the number pairs that make up a given number and determine when no other pairs can be found. They use frog...
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Adding and subtracting fractions: the same sized slice
Students establish a strategy for adding simple fractions. They convert improper fractions to mixed numbers and interpret drawings and storyboards.
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Piggie Pie
First graders use the turn and talk strategy when coming up with answers to questions about the book Piggy Pie. In this Piggy Pie lesson plan, 1st graders also predict what will happen next.
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Make Your Own "Weather" Map
Students develop and apply a variety of strategies to solve problems, with an emphasis on multi-step and non-routine problems. They acquire confidence in using mathematics meaningfully.
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Doghouses, Doors and Design
Students engage in active problem solving as they create a design for a doghouse.They work in collaborative groups to complete their task. In addition, they explore numerical problems and develop unique strategies to assist them with...
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Lost Worlds
Students, while using the strategy of identifying the main idea and supporting details, explore the three nonfiction selections of the lost worlds of Machu Picchu high in the Andes Mountains, Great Zimbabwe, and Anasazi. In addition,...
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